【摘要】 刻画地表水与地下水的相互作用过程及精确计算二者的交换量始终是个挑战,而新兴的温度示踪方法对于这方面的研究具有独特优势。重点介绍了地表水与地下水相互作用的温度示踪方法原理、应用及相关模拟的研究进展。温度示踪方法的数据获取成本低且温度适宜密集与连续监测,可对地表水与地下水相互作用过程进行精细刻画;在进行地表水与地下水相互作用的水-热耦合模拟时,温度数据可用于进一步校正模型,降低模型的不确定性,以提高交换量的计算精度。监测河水温度和河床沉积物内的水温,运用温度示踪方法研究河水与地下水的相互作用过程,并将水流及热运移数值模型相耦合,利用多源数据进行模型校正,可精细刻画地表水与地下水的交换量、相互作用带内的水流途径、流速及其变化趋势和控制因素,为地表水与地下水相互作用研究提供新的模型与方法。更多还原

【Abstract】 The great challenge is still to quantify the groundwater and surface water interaction after many years research.Due to recent advances in temperature sensing technologies and availability of relatively inexpensive temperature data loggers,groundwater temperature can be measured easily at low cost and in high frequencies.This allows heat to serve as a good groundwater tracer in studying groundwater and surface water interaction.The monitored temperatures in the surface water and the groundwaters can be used to trace the pattern of groundwater and river interaction.The temperature data can be also used as a supplementary to hydraulic data for model calibration when employing coupled groundwater flow and heat transport model and thus it could be helpful for further decreasing the model uncertainties.The coupled groundwater flow and heat transport model can be established and calibrated to 1) quantify the exchange of groundwater and surface water;2) delineate the flow paths and flow velocity in mixing zone;and 3) explore the mechanism controlling for groundwater and river exchange.Using heat as a tracer provides a new method for studying groundwater and river water interaction.更多还原